Retinoscopy

l Pratyush Dhakal (Bsc Optometry,DOA)

l SENIOR COUNSULTANT OPTOMETRIST

Retinoscopy

Principle: To bring the far point of the patient to the peephole of retinoscope

Procedure

l Its a dark room procedure

l Sphere

l Astigmatism

l Stradding

Procedure

l Traditional

l Sphero cylinder

Reflexes

Speed and brightness: when aprroching near neutralization the speed of movement will be very fast and it will brighter too

Width of reflex: the width of reflex will be broader and broader when you are nearing to the neutral point

Types of Reflexes

l Red regular Reflexes

l Irregular reflexes

l Scissors reflexes

l No reflexes

Errors of Retinoscopyl Inaccurate WD

l Examiner sittiing angle is more than 5 degree from visual axis of the patient

l Accomdation

l Wrong axis

3 steps of retinoscopy

l Put working distance first

l Start with “with motion”

l Add power to neutralize

l Minus cylindrical form

+2.50

+3.00

-4.00

-1.00

For example(WD=50cm)

Final power:+1.0/-0.50x180 Final power:-6.00/-3.00x180

Thank you

You can contact me for more helpful slides at Pratyush001@hotmail.com